Elbow for mask



FIG. 1 is a perspective illustration of an elbow for a mask according toour design;

FIG. 2 is a reverse perspective view of the elbow shown in FIG. 1;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a right side view thereof; with the left side view thereofbeing a mirror image thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof.

The ornamental design of an elbow for mask, as shown and described.